1. The problem is to verify or solve the equation $7 \times 2 \times 3.20 \times 2.20 = 78.35$. 2. We use the multiplication operation rule: multiply all numbers step-by-step. 3. Calculate step-by-step: - $7 \times 2 = 14$ - $14 \times 3.20 = 44.8$ - $44.8 \times 2.20 = 98.56$ 4. The left side evaluates to $98.56$, which does not equal $78.35$. 5. Therefore, the equation $7 \times 2 \times 3.20 \times 2.20 = 78.35$ is false. 6. If you want to find which value should replace one factor to get $78.35$, please specify.