The sum of (5/6) and (5/8) is multiplied by a number, and the product obtained is (7/20). What is this number?
(5/6)与(5/8)的和乘一个数，所得的积是(7/20)，这个数是多少？
<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(5/6) + (5/8)</gadget>
<output>35/24 = around 1.458333</output>

<gadget id="calculator">(7/20) / (35/24)</gadget>
<output>6/25 = around 0.24</output>

<result>6/25 = around 0.24</result>