After increasing 50 tons, it is 75 tons.
把50吨增加多少后是75吨．
<gadget id="calculator">75 / 50</gadget>
<output>3/2 = around 1.5</output>

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

<result>1/2 = around 0.5</result>