A number - B number = 16, A number: B number = 5: 3, what is the A number.
甲数-乙数=16，甲数：乙数=5：3，甲数是多少．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>