Jawapan

2016-07-28T23:01:28+08:00
100cm = 1m
100cm x 100cm = 10000cm²
maka 0.04 × 10000 = 400 cm²
2016-07-29T15:26:47+08:00
(0.04 * 100) cl = 4 cl

p/s:1.* = darab
      2.cl = cm kuasa 2