Calculate pinch your fingers and type a number.

Calculate and pinch your fingers, and make a number: seven.

Pinch a number is seven, because we are in various gestures, we look at this action, he uses two fingers, and then pinches and twists each other, so the action of pinching two fingers is generally compared to the number seven in our Chinese, just like the thumb and forefinger are compared to the number eight, so pinching this number should be the number seven.

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