35% of a number is 105, what is this number?
一个数的35%是105，这个数是多少．
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">105 / (7/20)</gadget>
<output>300</output>

<result>300</result>