Cortex-M4 (think $2) has 1 cycle multiplication and 2-12 cycle division (with early termination). If you go down to Cortex-M0 (think $0.50) then you get softwar

Cortex-M4 (think $2) has 1 cycle multiplication and 2-12 cycle division (with early termination). If you go down to Cortex-M0 (think $0.50) then you get software division which is indeed orders of magnitude slower. Of course lower down the line there isn't even hardware multiplication. Interestingly, the ARM11 in original RPi and RPi0 doesn't have hardware integer division (despite being 10x faster than typical M4 and typically having 10000x RAM), but it does have floating point division.