9/4*49/25/7/3*4*5*5/7/3

1 answer

To simplify the expression \( \frac{9}{4} \times \frac{49}{25} \div 7 \div 3 \times 4 \times 5 \times 5 \div 7 \div 3 \), we can break it down step by step.

  1. First, convert the division into multiplication by the reciprocal: \[ \frac{9}{4} \times \frac{49}{25} \times \frac{1}{7} \times \frac{1}{3} \times 4 \times 5 \times 5 \times \frac{1}{7} \times \frac{1}{3} \]

  2. Combine all factors: \[ = \frac{9 \times 49 \times 4 \times 5 \times 5}{4 \times 25 \times 7 \times 3 \times 7 \times 3} \]

  3. Simplify \(4\) and \(4\) in the numerator and denominator: \[ = \frac{9 \times 49 \times 5 \times 5}{25 \times 7 \times 3 \times 7 \times 3} \]

  4. \(49 = 7^2\), so we can rewrite the numerator and the denominator: \[ = \frac{9 \times 7^2 \times 5^2}{25 \times 7^2 \times 3^2} \]

  5. Cancel \(7^2\) from the numerator and denominator: \[ = \frac{9 \times 5^2}{25 \times 3^2} \]

  6. Recognize \(5^2 = 25\): \[ = \frac{9 \times 25}{25 \times 9} \]

  7. Cancel \(25\) and \(9\): \[ = 1 \]

Thus, the simplified value of the expression is \( \boxed{1} \).