The number of A is twice the number of B, then how much more is the number of A than the number of B
甲数是乙数的2倍，那么甲数比乙数多多少
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

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

<result>1</result>