There are about 300 eggs in a carton. There are 4 eggs with a difference of 3 lands, 5 lands with a difference of 4 lands, and 6 eggs with a land difference of 5. How many eggs are there in this box?
一箱鸡蛋300个左右，4个4个地数差3个，5个5个地数差4个，6个6个地数差5个，这箱鸡蛋一共有多少个？
<gadget id="calculator">2 * 6 * 5 * 5</gadget>
<output>300</output>

<gadget id="calculator">300 - 1</gadget>
<output>299</output>

<result>299</result>