eli5: How does an electronic calculator work?

Question

Does it “use” the most efficient approach when solving equations? For example I know a technique for solving larger multiplication or addition problems is to break the numbers up so you’re working with smaller sums. Ex: 60 X 4

60 X 2 = 120

120 X 2 = 240

Not to say that’s the most efficient. But what I’m wondering is if the calculator goes through some process (that’s the best process) of its own.

In: 4

Answer 1

A simple solar powered calculator doesn’t break apart multiplication into multiple addition operations because they don’t have a CPU with a clock, and every register shift or operation occurs with the pressing of the mechanical buttons. The simplification of multiplication into more but simpler operations can then only be done via machine code with a CPU.

Answer 2

A simple solar powered calculator doesn’t break apart multiplication into multiple addition operations because they don’t have a CPU with a clock, and every register shift or operation occurs with the pressing of the mechanical buttons. The simplification of multiplication into more but simpler operations can then only be done via machine code with a CPU.