A's number is 20, B's number is 3 less than A's (3/5), what is B's number?
甲数是20，乙数比甲数的(3/5)少3，乙数是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<result>9</result>