If the sum of a number and 85 is divided by 4, the quotient is 50. What is this number?
一个数与85的和除以4，商是50，这个数是多少？
<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<gadget id="calculator">200 - 85</gadget>
<output>115</output>

<result>115</result>