it is better to take the accelerationist route with imperial units and do nothing to make them a better fit for the real, scientific measurement system, as it would reduce the pressure to do away with them completely
You need to shoot it from a math gun. Load 8 rounds, shoot (/)5 times, repeat cycle 1 time (so it would be 2(") times in total). Divide the number of rounds left in the magazine by 2.54 to get metric meters, then divide by 100 for centimeters.