100+1000*2*200*300

To solve the expression \( 100 + 1000 \times 2 \times 200 \times 300 \), we need to follow the order of operations (multiplication before addition).

1. First, calculate the multiplication part: \[ 1000 \times 2 = 2000 \] \[ 2000 \times 200 = 400000 \] \[ 400000 \times 300 = 120000000 \]

2. Now, add 100 to the result: \[ 100 + 120000000 = 120000100 \]

So, the final answer is \( 120000100 \).