Answer :
3,000,000,000+100,000,000+90,000,000+7,000,000+400,000+80,000+5,000+0+20+6
3,000,000,000 + 100,000,000 + 90,000,000 + 7,000,000 + 400,000 + 80,000 + 5,000 + 20 + 6.