Answer:
6*10^5 + 4*10^4 + 5*10^3 + 3*10^2
Step-by-step explanation:
Let's break it down.
6*10^5 is 6 times 10 to the 5th power. That means 6*100,000. = 600,000.
4*10^4 is 4 times 10 to the 4th power. That means 4*10,000. = 40,000.
5*10^3 is 5 times 10 to the 3rd power. That means 5*1,000. = 5,000.
Finally, 3*10^2 is 3 times 10 to the 2nd power. That means 3*100. = 300.
Add it all up and you get 645,300.
