diff --git a/examples/13_ergonomic_algebra/example b/examples/13_ergonomic_algebra/example
new file mode 100755
index 0000000..b3bbfc6
Binary files /dev/null and b/examples/13_ergonomic_algebra/example differ
diff --git a/examples/13_ergonomic_algebra/example.c b/examples/13_ergonomic_algebra/example.c
new file mode 100644
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--- /dev/null
+++ b/examples/13_ergonomic_algebra/example.c
@@ -0,0 +1,26 @@
+#include "../../squiggle.h"
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define ln lognormal_params
+#define to(...) convert_ci_to_lognormal_params((ci) __VA_ARGS__)
+#define from(...) convert_lognormal_params_to_ci((ln) __VA_ARGS__)
+#define times(a,b) algebra_product_lognormals(a,b)
+
+int main()
+{
+    // set randomness seed
+    uint64_t* seed = malloc(sizeof(uint64_t));
+    *seed = 1000; // xorshift can't start with 0
+
+    ln a = to({.low = 1, .high = 10});
+    ln b = to({.low = 5, .high = 500});
+    ln c = times(a, b);
+
+    printf("Result: to(%f, %f)\n", from(c).low, from(c).high);
+    printf("One sample from it is: %f\n", sample_lognormal(c.logmean, c.logstd, seed));
+
+    free(seed);
+}
diff --git a/examples/13_ergonomic_algebra/makefile b/examples/13_ergonomic_algebra/makefile
new file mode 100644
index 0000000..ef385f7
--- /dev/null
+++ b/examples/13_ergonomic_algebra/makefile
@@ -0,0 +1,53 @@
+# Interface: 
+#   make
+#   make build
+#   make format
+#   make run
+
+# Compiler
+CC=gcc
+# CC=tcc # <= faster compilation
+
+# Main file
+SRC=example.c ../../squiggle.c
+OUTPUT=example
+
+## Dependencies
+MATH=-lm
+
+## Flags
+DEBUG= #'-g'
+STANDARD=-std=c99
+WARNINGS=-Wall
+OPTIMIZED=-O3  #-Ofast
+# OPENMP=-fopenmp
+
+## Formatter
+STYLE_BLUEPRINT=webkit
+FORMATTER=clang-format -i -style=$(STYLE_BLUEPRINT)
+
+## make build
+build: $(SRC)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(SRC) $(MATH) -o $(OUTPUT)
+
+format: $(SRC)
+	$(FORMATTER) $(SRC)
+
+run: $(SRC) $(OUTPUT)
+	OMP_NUM_THREADS=1 ./$(OUTPUT) && echo
+
+time-linux: 
+	@echo "Requires /bin/time, found on GNU/Linux systems" && echo
+	
+	@echo "Running 100x and taking avg time $(OUTPUT)"
+	@t=$$(/usr/bin/time -f "%e" -p bash -c 'for i in {1..100}; do $(OUTPUT); done' 2>&1 >/dev/null | grep real | awk '{print $$2}' ); echo "scale=2; 1000 * $$t / 100" | bc | sed "s|^|Time using 1 thread: |" | sed 's|$$|ms|' && echo
+
+## Profiling
+
+profile-linux: 
+	echo "Requires perf, which depends on the kernel version, and might be in linux-tools package or similar"
+	echo "Must be run as sudo"
+	$(CC) $(SRC) $(MATH) -o $(OUTPUT)
+	sudo perf record ./$(OUTPUT)
+	sudo perf report
+	rm perf.data