There is a batch of washing powder, if 5 packs are distributed to male employees and 4 packs to female employees, there will be 7 packs more; if 6 packs are distributed to male employees, 5 packs to female employees, 8 packs less; If there is one more employee, how many packages of washing powder are there in total?
有一批洗衣粉，若发给男员工每人5包，女员工每人4包，还多7包；若发给男员工每人6包，女员工5包，少8包；男员工比女员工多1人，共有多少包洗衣粉．
<gadget id="calculator">8 - 4</gadget>
<output>4</output>

<gadget id="calculator">7 + 5 + 4</gadget>
<output>16</output>

<gadget id="calculator">5 - 5 - 4</gadget>
<output>-4</output>

<gadget id="calculator">6 + (-4)</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<gadget id="calculator">40 + 28 + 7</gadget>
<output>75</output>

<result>75</result>