Three workshops A, B, and C are engaged in labor competition. The number of products produced by workshop B in 7 days is twice that of workshop A in 4 days; the number of products produced by workshop C in 3 days is higher than that produced by workshop B in 5 days. 1 more. It is known that workshop C produces 70 more products per day than workshop A, how many products does workshop A produce every day?
甲、乙、丙三个车间进行劳动竞赛，乙车间7天所生产的产品个数是甲车间4天所生产的2倍；丙车间3天生产的产品个数，比乙车间5天所生产的多1个．已知丙车间每天比甲车间多生产70个，问甲车间每天生产多少个产品？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">88 * (7/8)</gadget>
<output>77</output>

<result>77</result>