In the formula 90/5=18, if the divisor remains the same and the quotient is increased by 1, how much must the dividend be increased.
在90/5=18这个算式中，如果除数不变，又要使商增加1，被除数必须增加多少．
<gadget id="calculator">5 * 1</gadget>
<output>5</output>

<result>5</result>