In a division formula, the divisor is 71, and the remainder is the same as the quotient. When the remainder is the largest, what is the dividend.
在一个除法算式中，除数是71，余数和商相同，当余数最大时，被除数是多少．
<gadget id="calculator">70 * 71</gadget>
<output>4_970</output>

<gadget id="calculator">4_970 + 70</gadget>
<output>5_040</output>

<result>5_040</result>