A total of 250 trucks are used to transport 2.5 million kilograms of rice to the disaster area. If the length of each truck is 7.5 meters and the distance between two trucks is 5 meters, how long is the total length of the fleet?
把250万千克大米运往灾区，共调用250辆卡车，如果每辆卡车的长度为7.5米，两车之间相隔5米，那么这个车队共长多少米？
<gadget id="calculator">250 - 1</gadget>
<output>249</output>

<gadget id="calculator">5 * 249</gadget>
<output>1_245</output>

<gadget id="calculator">7.5 * 250</gadget>
<output>1_875</output>

<gadget id="calculator">1_245 + 1_875</gadget>
<output>3_120</output>

<result>3_120</result>