Jinhai Market transported a batch of steel products. If two vehicles with a load of 6 tons and one with a load of 18 tons were used to transport them, the six shipments would be completed. How many tons is this batch of steel?
金海市场运进一批钢材，如果用载重6吨和载重18吨的2辆汽车来运，6次刚好运完．这批钢材一共有多少吨？
<gadget id="calculator">18 + 6</gadget>
<output>24</output>

<gadget id="calculator">24 * 6</gadget>
<output>144</output>

<result>144</result>