There is a number divided by 5, multiplied by 4, subtracted by 15, and added to 35 to get 100. What is this number?
有一个数除以5，乘以4，减去15，再加上35等于100．这个数是多少．
<gadget id="calculator">100 - 35</gadget>
<output>65</output>

<gadget id="calculator">65 + 15</gadget>
<output>80</output>

<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>