How to learn to open paper and choose large and positive paper

The law: the customer's printing specifications are long and wide. Divide the large and positive paper size by the customer's specifications and long and wide dimensions twice.

Example 1: The size of the customer's finished product is 23 × 20cm. What is the number of openings?

Should I choose positive degree and large degree with 80 grams of paper?

119.4 ÷ 23 = 5 knives (20 open) 109.2 ÷ 23 = 4 knives (20 open)

119.4 ÷ 20 = 5 knives (15 open) 109.2 ÷ 20 = 5 knives (15 open)

88.9 ÷ 23 = 3 knives (15 open) 78.7 ÷ 23 = 3 knives (15 open)

88.9 ÷ 20 = 4 knives (20 open) 78.8 ÷ 20 = 3 knives (20 open)

Generosity: 0.03 yuan / sheet

Positive degree: 0.0327 yuan / sheet

(The above price is calculated by the above formula)

Large size paper should be used as printing paper.

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