A pile of sand is first used (3/10), and then 34 tons are shipped in. At this time, the number of tons of sand is the original (9/8), how many tons of sand are used?
一堆沙，先用去它的(3/10)后，又运来34吨，这时沙的吨数是原来的(9/8)，用去多少吨沙？
<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

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

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(9/8) - (7/10)</gadget>
<output>17/40 = around 0.425</output>

<gadget id="calculator">34 / (17/40)</gadget>
<output>80</output>

<gadget id="calculator">80 * (3/10)</gadget>
<output>24</output>

<result>24</result>