Use a number to divide 200 with 4, 300 with 6, and 500 with 10. What is the largest number?
用一个数去除200余4，除300余6，除500余10．求这个数最大是多少？
<gadget id="calculator">7 * 7 * 2</gadget>
<output>98</output>

<result>98</result>