How many ㎡ is 10 a?
10 a = 1,000 ㎡
It is 1,000 ㎡, so saying 1,000 ㎡ is fine — rounding is within 0.5%.
And how many a is 10 ㎡?
10 ㎡ = 0.1 a
Formula: ㎡ = a × 100
a to ㎡ around this value
1 a100㎡
2 a200㎡
3 a300㎡
4 a400㎡
5 a500㎡
6 a600㎡
7 a700㎡
8 a800㎡
9 a900㎡
10 a1,000㎡
11 a1,100㎡
12 a1,200㎡
13 a1,300㎡
14 a1,400㎡
15 a1,500㎡
16 a1,600㎡
17 a1,700㎡
18 a1,800㎡
19 a1,900㎡
20 a2,000㎡