This is an unauthorized fan translation. Romanized Japanese text is in blue italics.
Editorial comments are in green.
The shooting distance is 700 meters. He's calculating the Russian soldiers' average required time for deviation shooting alignment. The T-34 's 85mm shell can destroy a Panzer IV with a single shot. They didn't stop. It's the most primitive way of avoiding a firing line, but if you mix sudden stops and sudden moves, it's quite effective.