6 looms weave 1800m per day, how many m can we weave per day after adding 4 looms of the same kind?
6台织布机每天织布1800m，增加4台同样的织布机后，每天可以织布多少m？
<gadget id="calculator">1_800 / 6</gadget>
<output>300</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">300 * 10</gadget>
<output>3_000</output>

<result>3_000</result>