newbie ask pin arduino

ask is there any easy way to increase pin in arduino? sorry my English is bad

thanks for the answer

There are multiplexer chips that can appear to make 8 input pins in place of one Arduino pin, and there are multiplexer chips that can appear to make 8 output pins in place of one Arduino pin

1. In the following diagram, 7 output lines of the UNO are conditioned by 74LS259 and 74LS138 chips to produce 12 output lines. |500x312

2. In the following diagram, 3 IO lines are conditioned by MAX7219 chip to generate 16 output lines. |500x189

thanks for the answer :))