In a division formula, both the quotient and the divisor are 4, the remainder is 1, and what is the dividend.
在一个除法算式中，商和除数都是4，余数是1，被除数是多少．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>