Whats the standard form of writing this problem 4 (1,000,000) +7 (100) +2 (1) and what would the answer be

The number (another number) represent multiplication between the 2 numbers, so if you have this problem :
4 (1,000,000) , it is 4 x 1,000,000, which is 4,000,000
and if you have :
7 (100) , it is also 7 x 100 which is 700
and if you have :
2 (1) , it is also 2 x 1 which is 2
now, there is (+) between each number, but the most important rule is multiplication ALWAYS comes first and not by the places, but by solving, so you ALWAYS solve multiplication first and then you add them, if you add : you will get :
4,000,000 + 700 + 2 = 4,000,702

Hope you understood it