The construction site needs to transport 300 tons of timber, and each truck transports 15 tons of timber. Twelve trucks have already been transported. How many trucks will be needed to transport the remaining timber?
建筑工地要运300吨木材，每辆卡车运送15吨木材，已经运来了12车，剩下的木材还要多少车才能运完？
<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">300 - 180</gadget>
<output>120</output>

<gadget id="calculator">120 / 15</gadget>
<output>8</output>

<result>8</result>