Two vehicles, A and B, transport a batch of coal. When the transportation is finished, vehicle A has transported 60% of the total and 9 tons more, and the tonnage transported by vehicle B is equivalent to 50% of that of vehicle A. How many tons of coal are there in total?
甲、乙两车共运一批煤，运完时，甲车运了总数的60%还多9吨，乙车运的吨数相当于甲车的50%，这批煤共有多少吨？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">9 * (1/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">9 + (9/2)</gadget>
<output>27/2 = around 13.5</output>

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

<gadget id="calculator">(3/5) * (1/2)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/5) - (3/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(27/2) / (1/10)</gadget>
<output>135</output>

<result>135</result>