A is 100, less than B (2/3), ask B.
甲是100，比乙少(2/3)，求乙．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">100 / (1/3)</gadget>
<output>300</output>

<result>300</result>