The mass of a pile of sand is equal to (7/8) plus (7/8) tons of the pile of sand. How much does the pile of sand weigh?
一堆沙子的质量等于这堆沙子的(7/8)加上(7/8)吨，这堆沙子重多少．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(7/8) / (1/8)</gadget>
<output>7</output>

<result>7</result>