For a batch of fruits, if you put 30 in each box, you will get 20 more; if you put 35 in each box, you will get 10 less. How many fruits are there at least in this batch?
一批水果，每箱放30个则多20个；每箱放35个则少10个．这批水果至少有多少个？
<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<gadget id="calculator">35 - 30</gadget>
<output>5</output>

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

<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<result>200</result>