If a car transports 6 tons of rice at a time, how many times does it take to transport 90 tons of rice by adding 4 similar cars?
一辆汽车一次运大米6吨，增加同样的汽车4辆，运90吨大米要运多少次．
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">90 / 30</gadget>
<output>3</output>

<result>3</result>