Number A is 100, which is 20 more than Number B, how much more is Number A than Number B
甲数是100，比乙数多20，甲数比乙数多多少
<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>