200000000000000000000000000*99999999999999999999

The multiplication of \( 200,000,000,000,000,000,000,000,000 \) and \( 99,999,999,999,999,999,999 \) can be calculated as follows:

\[ 200,000,000,000,000,000,000,000,000 \times 99,999,999,999,999,999,999 = 19999999999999999998000000000000000000000000000 \]

So, the result is:

\[ 19,999,999,999,999,999,998,000,000,000,000,000,000,000,000 \]