A's number is 15, B's number is 10, how much more A's number than B's number.
甲数是15，乙数是10，甲数比乙数多多少．
<gadget id="calculator">15 - 10</gadget>
<output>5</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>