A batch of steel materials needs 45 vehicles to be loaded by small carts; if loaded by large carts, only 36 vehicles are needed. Each large cart is loaded with 2 tons more than each small cart. How many tons is this batch of steel?
一批钢材，用小车装载，要用45辆；如果用大车装载，只需要用36辆．每辆大车比每辆小车多装2吨．这批钢材有多少吨？
<gadget id="calculator">45 - 36</gadget>
<output>9</output>

<gadget id="calculator">36 / 9</gadget>
<output>4</output>

<gadget id="calculator">2 * 4 * 45</gadget>
<output>360</output>

<result>360</result>