A certain primary school needs to use 110 tons of coal. First, 30 tons are transported by truck, and the rest is transported by car, 4 tons each time. How many times will it take to transport the remaining coal? (answer in two ways)
某小学需要用煤110吨，先用大车运了30吨，剩下的改用汽车运，每次运4吨，剩下的要几次才能运完？(用两种方法解答)
<gadget id="calculator">110 - 30</gadget>
<output>80</output>

<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<result>20</result>