Vehicles A and B transport a batch of coal together. When the coal is finished, vehicle A transports (7/15) more than 9 tons of the total, 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(7/15)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">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(7/15) * (1/2)</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">1 - (7/15) - (7/30)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(27/2) / (3/10)</gadget>
<output>45</output>

<result>45</result>