我想为我的不和机器人设置一个冷却时间，下面是代码:

    if (!cooldowns.has(command.name)) {
        cooldowns.set(command.name, new Discord.Collection());
    }
    
    const now = Date.now();
    const timestamps = cooldowns.get(command.name);
    const cooldownAmount = (command.cooldown || 3) * 1000;

    if (timestamps.has(message.author.id)) {
    const expirationTime = timestamps.get(message.author.id) + cooldownAmount;

    if (now < expirationTime) {
        const timeLeft = (expirationTime - now) % 3600 / 60
        return message.reply(`please wait ${timeLeft.toFixed(1)} Hours before reusing the \`${command.name}\` command.`);
    }
}

timestamps.set(message.author.id, now);
setTimeout(() => timestamps.delete(message.author.id), cooldownAmount);

该命令的延迟为'86400'/24小时，但输出显示36.2小时而不是24小时。 有人知道为什么吗？