None.
A metre is a measure of length or distance while a square millimetre is a measure of area. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
Circumference is 31.4159 mm Area is 78.539 mm2
0.16 m2 = 160,000 mm2
cm2 = (10mm)2= 100 mm2.
49m * 49 m = 2401 m2 200 mm * 100 mm = 20,000 mm2 = 0.02 m2 So number of blocks = 2401/0.02 = 120,050
Each unit = 296mm*296mm = 87616 mm2 80 sq metres = 80*1000*1000 = 8*107 mm2 Number of small squares = 8*107/87616 = 913.1 So 913 will fit in the area and leave a little space. You will require a minimum of 914 to cover the area.
Meter is a unit of length; square mm. is a unit of area. It is not possible to convert one to the other.
1 meter2 is 1 meter by 1 meter, or 1000mm by 1000mm. Therefore: 1 meter2 = 1,000,000 mm2 Dividing both by 1,000,000 gives: 1/1,000,000 meter2 = 1 mm2
100mm2
Circumference is 31.4159 mm Area is 78.539 mm2
100
1m² = 1,000,000 mm²
1 mm2
mm2
1 mm is 1/10 of a cm, so 1 mm2 is 1/100 of a cm2.
0.051828 ft2
100 mm2
0.16 m2 = 160,000 mm2