Rearrange the commas according to the International Place Value Chart: 29,70,99,140.
Step 1: Write the given number without commas separating the periods.
The number is 297099140
Step 2: Place the commas as per International System of Numeration, that is, after every 3 digits starting from the right.
The required rearrangement is 297,099,140.
Hence 297,099,140 is required solution