I want to know the size of our house, but the tape measure is not long enough. I will measure the area of the floor tile.

Each floor tile is 70 cm long and 40 cm wide, with an area of 70 cm× 40 cm = 2,800 square cm = 0.28 square meter. ..

There are 26 tiles in my study, with an area of 26× 0.28m2 = 7.28m2 ..

There are 48 floor tiles in the living room, with an area of 48× 0.28m2 =13.44m2. ..

There are 42 tiles in the bedroom, 14 tiles, with a length of 70cm, a width of 10 cm and an area of 42× 0.28m2+14× 70cm×10cm =12.74m2. ..

There are 20 floor tiles in the lobby, with an area of 20× 0.28m2 = 5.6m2 ..

There are 12 tiles on the balcony, with an area of12× 0.28m2 = 3.36m2. ..

Finally, the total area of my home is 7.28+13.44+12.74+5.6+3.36 = 42.42 m2.