The free spin function enters if there are more than 5 scatter symbols in the main game, and adds 3 free spins if there are 3 scatter in the free spin.
A multiplier symbol appears probabilistically for each spin, and at the end of the win streak, the multiplier symbol is multiplied by the sum of the dividends indicated to pay the winnings.
In free spin, if there is a previously applied dividend, the dividend of the multiplier symbol is added based on the previously applied dividend, and when the free spin ends, the previously applied dividend is initialized.
All symbols identify the winning combination by the number that appears on the screen.
If there is a win combination, the symbols that make up the combination disappear, the rest of the symbols fall down if there is an empty space, and the empty space is filled with new symbols.
This function is repeated until there is no winning combination.