Three vehicles, A, B, and C, transport a batch of coal. Vehicle A transports 40% of the total, and vehicle B transports 60% of the total. It is known that car A has transported 28 tons more than car B. How many tons of coal are there in total?
甲、乙、丙三辆汽车共运一批煤，甲车运走了总数的40%，乙车运走的是丙车的60%．已知甲车比乙车多运了28吨，这堆煤共多少吨？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(3/5) / (8/5)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) * (3/5)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">(2/5) - (9/40)</gadget>
<output>7/40 = around 0.175</output>

<gadget id="calculator">28 / (7/40)</gadget>
<output>160</output>

<result>160</result>