The number of A is 1.4 times of the number of B, how much more is the number of A than the number of B
甲数是乙数的1.4倍，甲数比乙数多多少
<gadget id="calculator">1.4 - 1</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 / 1</gadget>
<output>0.4</output>

<result>0.4</result>