käänteiskertolaskun
Käänteiskertolaskun, known in English as reciprocal multiplication or multiplicative inverse, refers to the operation that undoes multiplication. For any non-zero number 'a', its reciprocal, denoted as 1/a or a⁻¹, is the number that, when multiplied by 'a', results in the multiplicative identity, which is 1. This means that a * (1/a) = 1.
The concept of a reciprocal is fundamental in arithmetic and algebra. Division can be understood as multiplication
Fractions inherently represent reciprocals. The reciprocal of a fraction a/b is b/a. For instance, the reciprocal