Rajat created an informative message. He forwards the message to $5$ people. Each of the five people forward the message to next $5$ people and the chain goes on. The message is forwarded $5$ times. Which of the following calculation can be used to find number of times message is forwarded?

Evaluate: ${\left[{\left(\frac{9}{5}\right)}^3÷{\left(\frac{9}{5}\right)}^5\right]}^2$

The atomic number of a carbon atom is $6$. The number of protons and electrons in a carbon atom is $6.$ The weight of a proton is $\approx$$1.67492\times {10}^{-27} \mathrm{kg}$  and that of an electron is $\approx 9.1\times {10}^{-31} \mathrm{kg}$. Find the product of the weight of all the protons and electrons in the carbon atom.