Salutations!
To round the number to the nearest tens, you need know whether the number next to tens is greater than 5 or lesser than 5. If its greater than, you need to round up by adding +1 to the tens place. if its lesser than 5, you need to round down.
1,627,187 rounded to the nearest tens = 1,627,190.
Hope I helped (:
Have a great day!
