The school transported 1,900 tons of cement, and 15 ships were used to transport it, with an average of 120 tons per ship. The rest was transported by car. How many tons of cement did the car transport?
学校运来1900吨水泥，用15条船来运，平均每条船装了120吨，余下的用汽车运，汽车运了多少吨水泥？
<gadget id="calculator">15 * 120</gadget>
<output>1_800</output>

<gadget id="calculator">1_900 - 1_800</gadget>
<output>100</output>

<result>100</result>