Two vehicles, A and B, transported goods at the same time. Vehicle A transported 5 times, and vehicle B transported 7 times. Vehicle A transported 50 tons each time, and vehicle B transported 30 tons each time. How many tons more did vehicle A transport than vehicle B?
甲乙两车同时运货，甲车运了5次，乙车运了7次，甲车每次运50吨，乙车每次运30吨，甲车比乙车共多运了多少吨？
<gadget id="calculator">50 * 5</gadget>
<output>250</output>

<gadget id="calculator">30 * 7</gadget>
<output>210</output>

<gadget id="calculator">250 - 210</gadget>
<output>40</output>

<result>40</result>