The sum of (5/8) plus (5/4) is equal to (3/10) of a number, what is this number? (solution by equation)
(5/8)加上(5/4)的和等于一个数的(3/10)，这个数是多少？(用方程解)
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/8) + (5/4)</gadget>
<output>15/8 = around 1.875</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(15/8) / (3/10)</gadget>
<output>25/4 = around 6.25</output>

<result>25/4 = around 6.25</result>