A 4-cm square can be divided into 1-cm squares by drawing grid lines every 1 cm.<br><br>
&bull; The square is 4 cm wide and 4 cm tall.<br>
&bull; Number of 1-cm squares = 4 &times; 4 = 16.<br>
&bull; Area of the 4-cm square = side &times; side = 4 cm &times; 4 cm = 16 cm&sup2;.<br><br>
Final Answer: 16, 16