When the divisor is 2.5 times the dividend, the quotient obtained at this time is the same as the quotient obtained by the following formula.
当除数是被除数的2.5倍时，这时所得的商与下面算式多少所得的商相同．
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>