The number B is (3/5) of the number A. It is known that the number A is 40, how much more the number A is than the number B.
乙数是甲数的(3/5)，已知甲数是40，甲数比乙数多多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 * (2/5)</gadget>
<output>16</output>

<result>16</result>