First, we need to convert the length of the ribbon to centimeters to match the length of the ribbon pieces we plan to cut:
4m 20cm = (4 x 100)cm + 20cm = 420cm
Next, we can divide the total length of the ribbon by the length of each piece to find how many pieces we can cut:
420cm ÷ 70cm = 6
Therefore, we can cut 6 smaller ribbons, each 70cm long, from the 4m 20cm length of ribbon we have.