The Chinese school distributed washing powder to the teacher of the thinking training class. If each male teacher is given 3 packs and female teacher is 4 packs, then there will be 8 more packs; if each male teacher is given 4 packs and each female teacher is 5 packs, then there will be 7 packs less. It is known that there are 1 more male teachers than female teachers, so how many packets of washing powder are there in total?
华校给思维训练课老师发洗衣粉．如果给男老师每人3包，女老师每人4包，那么就会多出8包；如果给男老师每人4包，女老师每人5包，那么就会少7包．已知男老师比女老师多1人，那么共有多少包洗衣粉？
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

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

<gadget id="calculator">24 + 28 + 8</gadget>
<output>60</output>

<result>60</result>