There are several commandos participating in a certain construction site battle. It is known that the number of each commando team is the same, and the number of female members in each team is (7/18) the number of male members in the team. Later, the superior transferred half of the team members from the first commando, and all of them were male members, so the number of female commandos on the construction site was the number of all remaining male commandos (8/17). Q: How many commandos went to the construction site to fight at the beginning?
有若干个突击队参加某工地会战．已知每个突击队人数相同，而且每个队的女队员人数是该队男队员人数的(7/18)．以后上级从第一突击队调走了该队的一半队员，而且全部是男队员，于是工地上全体女突击队人数是剩下的全体男突击队员人数的(8/17)．问：开始有几支突击队到工地会战？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">17 + 8</gadget>
<output>25</output>

<gadget id="calculator">8 / 25</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">7 + 18</gadget>
<output>25</output>

<gadget id="calculator">7 / 25</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">1 / (7/25)</gadget>
<output>25/7 = around 3.571429</output>

<gadget id="calculator">1 / (8/25) / (25/7)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/2) / (1/8)</gadget>
<output>4</output>

<result>4</result>