The greatest multiple of 36 is infinite.
30
50
Step 1. I look in the hundredths place. If I see a 5 or more I round up, otherwise down, to the next multiple of one tenth. Step 2. The number in the hundredths place is 5 so I know to round up. Step 3. The next higher multiple of one tenth is 21.4. That is the answer.
10.
10*3 = 30
If you are talking about in multiples of 6, then the tenth multiple would be 60.
2 copies of 4 tenth is 8 tenth.
one tenth of 560 is 56
31.4
Tenths
2