The ratio of the numbers A and B is 4:3, the number B is 60, what is the number A?
甲、乙两数的比是4：3，乙数是60，甲数是多少．
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<result>80</result>