Xiao Ming should divide a number by 7, but he added 7 to get 98, and asked him what his original answer was.
小明理应给一个数除以7，但他加上了7得98，问他原来的回答是多少．
<gadget id="calculator">98 - 7</gadget>
<output>91</output>

<gadget id="calculator">91 / 7</gadget>
<output>13</output>

<result>13</result>