In a subtraction formula, the minuend is 5 times of the difference. It is known that the subtrahend is 16, what is the minuend.
在一个减法算式里，被减数是差的5倍，已知减数是16，被减数是多少．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>