`Int` - square operations #1946

Job	Run time
build-benchmarks	49s
build (1.81.0, thumbv7em-none-eabi)	44s
build (1.81.0, wasm32-unknown-unknown)	42s
careful	1m 18s
build (stable, thumbv7em-none-eabi)	1m 11s
build (stable, wasm32-unknown-unknown)	36s
clippy	19s
cross (aarch64-unknown-linux-gnu, stable)	2m 42s
doc	24s
cross (powerpc-unknown-linux-gnu, stable)	3m 14s
minimal-versions	34s
miri (x86_64-unknown-linux-gnu)	4m 24s
miri (s390x-unknown-linux-gnu)	4m 34s
rustfmt	14s
test (i686-unknown-linux-gnu, 1.81.0, sudo apt update && sudo apt install gcc-multilib)	1m 50s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 51s
test (x86_64-unknown-linux-gnu, 1.81.0)	1m 35s
test (x86_64-unknown-linux-gnu, stable)	1m 29s
	28m 30s

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