The ratio of the numbers A and B is 3:4, the number B minus the number A is 10, what is the number B?
甲乙两数的比是3：4，乙数减甲数得10，乙数是多少．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<result>40</result>