3 boys and 7 girls stand in a row, and there are at least 2 girls between every 2 boys, how many ways are there in total? What about standing in a circle?
3个男生和7个女生站成一排，要求每2个男生之间至少有2个女生，共有多少种排列方法？如果站成一圈呢？
<gadget id="calculator">3 * 2 * 1 * 7 * 6 * 5 * 4 * 3 * 2 * 1</gadget>
<output>30_240</output>

<result>30_240</result>