Answer:
To simplify the expression \(5 \times 73 \times 154 \times 21 \div a^2 \times 14^2 \times 5\), we first multiply the numbers together and then divide by the variables:
\[5 \times 73 \times 154 \times 21 = 957,390\]
\[14^2 = 196\]
So, the expression simplifies to:
\[\frac{957,390}{a^2 \times 196 \times 5}\]
Now, we can further simplify by dividing 957,390 by 980 \( (196 \times 5) \):
\[\frac{957,390}{980} = 977.04082\]
So, the simplified expression is approximately \(977.04082 / a^2\).
