When you multiply a number by 2.5, the wrong result is divided by 2.5, and the result is 1.6

When you multiply a number by 2.5, the wrong result is divided by 2.5, and the result is 1.6

1.6x2.5x2.5=4x2.5=10
When calculating a number multiplied by 2.5, the wrong result is divided by 2.5, and the result is 1.6