If 6*3=18then what is 600000*300=

I'm not sure why a math question was in this section, but to answer your question:

It's 180,000,000.

The trick is disregard to the 0's first from

600,000 and 300 - and multiply the numbers that are not zeros.

6 x 3 = 18.

Then you add every zero into your

answer

6 (00), (000) = 5 zeroes

3 (00) = 2 Zeroes

There are a total of 7 zeroes here. Thus the answer below should also have 7 zeroes as well!

= 18 (0), (000), (000).