The Fruit Wholesale Department needs to import a batch of fruits, 25% for the first shipment, 1.5 tons for the second time, and 75% of this batch of fruits for the two times. Find the tonnage of the fruits for the first shipment.
水果批发部要运进一批水果，第一次运进25%，第二次运进1.5吨，两次共运进这批水果的75%，求第一次运进水果的吨数．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1.5 / (1/2)</gadget>
<output>3</output>

<gadget id="calculator">3 * (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>