The difference of 85 minus 13 is divided by 9, and the comprehensive formula is listed: how much.
85减去13的差再除以9，列综合式：多少．
<gadget id="calculator">85 - 13</gadget>
<output>72</output>

<gadget id="calculator">72 / 9</gadget>
<output>8</output>

<result>8</result>