The agricultural materials company needs to transport 250 tons of fertilizers to the countryside, 60% of which are transported by ship and the rest by truck. How many tons more are shipped by ship than by truck?
农资公司要运250吨化肥到农村，其中60%用船运，其余的用卡车运．用船运的比用卡车运的多多少吨？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">250 * (1/5)</gadget>
<output>50</output>

<result>50</result>